MOV to WebM Converter

Convert MOV videos to WebM for smaller file sizes and efficient web delivery. LessMB processes the conversion locally in your browser.

Drop your file here, or

Files stay on your device

MP4 · MOV · WebM · MKV · AVI

No upload required100% free foreverWorks in your browser
How it works

MOV to WebM Converter for private browser workflows

Smaller files for the web

WebM with VP9 encoding often produces smaller files than MOV/H.264, reducing bandwidth for embedded web video.

HTML5 video ready

WebM is natively supported by all modern browsers, making it ideal for HTML5 video elements.

Local browser conversion

Your MOV file is converted on your device. Client footage and personal recordings never leave your browser.

Common use cases

Convert MOV recordings to WebM for efficient embedding on websites.

Website video

Reduce CDN costs by serving smaller WebM files instead of MOV.

Bandwidth savings

Use royalty-free WebM for open-source projects and platforms.

Open format

Related tools

Video format conversion

MOV to MP4 Converter

Convert QuickTime MOV videos to MP4 for playback on any device, platform or editing tool. LessMB processes the conversion locally in your browser — no upload, no account.

Open tool
Video format conversion

MP4 to WebM Converter

Convert MP4 videos to WebM for smaller file sizes and efficient web delivery. WebM (VP8/VP9) is ideal for HTML5 video. Processing runs locally in your browser.

Open tool
Video format conversion

WebM to MP4 Converter

Convert WebM videos to MP4 for playback on iPhone, Safari, editing software and platforms that do not support WebM. Processing runs locally in your browser.

Open tool

Related guides

iPhone video compression

How to Compress a Video on iPhone

If an iPhone video is too large for email, chat, forms or shared drives, you can reduce its file size directly in Safari. LessMB runs video compression in the browser, so the clip stays on your device during the session.

Open guide
Email video compression

How to Compress a Video for Email

Email attachment limits are often much smaller than modern phone or screen-recording videos. LessMB can reduce video size locally and export a practical MP4 for sharing.

Open guide
Video storage FAQ

Does Google Drive Compress Video?

Google Drive stores your uploaded video file, but preview playback may use processed versions. If your goal is a smaller file for upload or sharing, compress the video before sending it to Drive.

Open guide
FAQ

MOV to WebM Converter FAQ

Answers for the most common questions about this tool, supported workflows, and local browser processing.

No uploadFree toolBrowser-based
Is converting MOV to WebM free?

Yes. LessMB converts MOV to WebM for free in your browser without an account.

Is WebM smaller than MOV?

Usually yes. WebM with VP9 encoding often produces smaller files than H.264 in MOV at similar quality.

Are files uploaded?

No. Conversion runs locally in your browser session.